Detect coincident points and bail out of the line join code as necessary.
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@ -375,6 +375,10 @@ impl Contour {
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let (p0, p1) = (self.position_of_last(2), self.position_of_last(1));
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let prev_tangent = LineSegment2F::new(p0, p1);
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if prev_tangent.square_length() < EPSILON || next_tangent.square_length() < EPSILON {
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return;
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}
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match join {
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LineJoin::Bevel => {}
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LineJoin::Miter(miter_limit) => {
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